If you haven't caught up on the story (and if that's the case, where have you been?), here's a little background on the issue in reverse chronological order:
Yes, the iPhone 4 is broken / No, the iPhone 4 is not broken
Consumer Reports confirms iPhone 4 antenna problems -- and so do we
Apple: iPhone 4 reception problem is a software issue, fix coming in 'a few weeks'
iPhone 4's antenna problem looks worse than it is, but it's still bad
Apple hiring iPhone antenna engineers for some reason
Apple telling reps to smooth over iPhone 4 reception complaints, not to offer free bumpers?
iPhone 4 antenna woes contextualized by dude in the know
The Jimmy Fallon Test: is the iPhone 4 dropping fewer calls?
Hey Apple, you're holding it wrong
Apple responds to iPhone 4 reception issues: you're holding the phone the wrong way